United States Library of Congress. (1928). Classification. Class P, P-PA: Philology, linguistic, classical philology, classical literature. U. S. Government Printing Office.
芝加哥风格引文United States Library of Congress. Classification. Class P, P-PA: Philology, Linguistic, Classical Philology, Classical Literature. Washington: U. S. Government Printing Office, 1928.
MLA引文United States Library of Congress. Classification. Class P, P-PA: Philology, Linguistic, Classical Philology, Classical Literature. U. S. Government Printing Office, 1928.
警告：这些引文格式不一定是100％准确.